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/*
* The Mana Client
* Copyright (C) 2009-2012 The Mana Developers
*
* This file is part of The Mana Client.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "resources/ambientlayer.h"
#include "graphics.h"
#include "resources/image.h"
#include "resources/resourcemanager.h"
AmbientLayer::AmbientLayer(Image *img)
: mImage(img)
{}
AmbientLayer::~AmbientLayer() = default;
void AmbientLayer::update(int timePassed, float dx, float dy)
{
// Self scrolling of the overlay
mPosX -= mSpeedX * timePassed / 10;
mPosY -= mSpeedY * timePassed / 10;
// Parallax scrolling
mPosX += dx * mParallax;
mPosY += dy * mParallax;
int imgW = mImage->getWidth();
int imgH = mImage->getHeight();
// Wrap values
while (mPosX > imgW)
mPosX -= imgW;
while (mPosX < 0)
mPosX += imgW;
while (mPosY > imgH)
mPosY -= imgH;
while (mPosY < 0)
mPosY += imgH;
}
void AmbientLayer::draw(Graphics *graphics)
{
const auto screenWidth = graphics->getWidth();
const auto screenHeight = graphics->getHeight();
const auto x = static_cast<int>(mPosX);
const auto y = static_cast<int>(mPosY);
if (!mKeepRatio)
{
graphics->drawImagePattern(mImage,
-x, -y,
screenWidth + x,
screenHeight + y);
}
else
{
graphics->drawRescaledImagePattern(mImage,
-x, -y,
screenWidth + x,
screenHeight + y,
mImage->getWidth() * screenWidth / 800,
mImage->getHeight() * screenHeight / 600);
}
}
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